Modify photo placeholder (default.svg) for bright and dark modes;

Update document README.

README.md

@@ -12,7 +12,7 @@ other services.
 
 ### Reasons for creating FASI
 
-The main reasons for the realization of FASI are:
+The main reasons for the realization of FASI are to:
 
 - Add interactive capabilities, as well as vCard information;
 - Create rapport with the viewers, by displaying vCard information, such as Full
@@ -26,6 +26,8 @@ The main reasons for the realization of FASI are:
 - Realize that HTTP is obsolete and should be treated as an optional publishing
   mean, because anything that HTTP offers, is already possible with XMPP, since
   a couple of decades ago.
+- Extend support for Gopher and Gemini, which do not allow scripts, and,
+  therefore, a server-side is essential for these ASCII type mediums.
 
 ### Special features
 
@@ -36,14 +38,16 @@ The main reasons for the realization of FASI are:
 - View journal articles (i.e. PubSub node items that are published as Atom Over
   XMPP).
 
-### Byproduct
+### Unintended features
 
 - Browse services;
 - Explore JID and node items.
 
 ### Other features
 
-- Customization for specific brands (e.g. monocles chat);
+- Customization for specific brands (e.g. Conversations, Cheogram, monocles chat
+  and yaxim);
+- Dark mode;
 - Dynamic background in accordance to the photo colors.
 
 ## Technicalities
@@ -88,8 +92,10 @@ Schimon Jehudah Zachary 2024
 
 ## Thanks
 
-A special thank you for Mr. Georg Lukas who has exposed the HTML invitation page
-to the founder of this project.
+A special thank you for Mr. Georg Lukas of [op-co.de](https://op-co.de/) from
+Germany, who has gracefully published a sophisticated client-side HTML
+invitation page, and consequently exposed that idea to the founder of this
+project.
 
 ## Similar Projects
 

photo/default.svg

@@ -1,53 +1 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-
-<svg
-   version="1.1"
-   id="svg1"
-   width="1333.3333"
-   height="936"
-   viewBox="0 0 1333.3333 936"
-   sodipodi:docname="man-and-woman-faces-profiles_0003.svg"
-   inkscape:version="1.3.2 (091e20ef0f, 2023-11-25, custom)"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:svg="http://www.w3.org/2000/svg">
-  <defs
-     id="defs1" />
-  <sodipodi:namedview
-     id="namedview1"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     inkscape:showpageshadow="2"
-     inkscape:pageopacity="0.0"
-     inkscape:pagecheckerboard="0"
-     inkscape:deskcolor="#d1d1d1"
-     inkscape:zoom="0.70710678"
-     inkscape:cx="613.76868"
-     inkscape:cy="471.64022"
-     inkscape:window-width="1916"
-     inkscape:window-height="1032"
-     inkscape:window-x="0"
-     inkscape:window-y="22"
-     inkscape:window-maximized="1"
-     inkscape:current-layer="g8794" />
-  <g
-     inkscape:groupmode="layer"
-     inkscape:label="Image"
-     id="g1">
-    <g
-       id="g8794"
-       transform="translate(-2.6666735,-12.61628)">
-      <path
-         style="fill:#1f0d01;stroke:none"
-         d="m 778.66662,330.66667 c -11.54549,1.25126 -20.26286,-0.0486 -30.66667,-5.33334 7.67343,10.9939 15.993,16.05445 29.33334,17.33334 C 764.72318,362.7476 748.5854,379.17855 732.04162,396 c -6.99943,7.1169 -18.55119,16.85307 -17.9178,27.94938 0.85913,15.04981 21.67724,17.56047 24.29931,32.05648 3.19011,17.63656 -17.83992,27.83032 5.57682,41.32747 v 1.33334 c -25.15966,11.08516 3.61166,26.34334 6.63062,40.20337 5.22363,23.98177 -13.09611,43.30798 16.08097,59.6333 45.78524,25.61792 103.69458,-6.27731 149.28767,15.36836 29.67464,14.08826 45.67895,49.89706 55.14778,79.46163 24.79737,77.42473 13.08749,152.06592 -13.81372,226.66667 34.18506,-5.66569 69.10483,-11.48389 95.94943,-35.36157 22.156,-19.7072 34.0021,-46.0669 50.58,-69.97176 22.3841,-32.2771 53.8691,-62.79973 90.8039,-77.33334 -10.2422,-11.77604 -22.262,-21.80875 -31.2444,-34.67114 -28.7341,-41.14648 -46.4761,-95.21322 -47.4223,-145.32886 21.854,1.87334 42.8049,1.52751 64,-4.7882 19.1696,-5.71216 37.3508,-15.66065 53.3334,-27.5907 C 1329.0865,453.48031 1330.2467,324.12638 1283.5076,224 1247.5468,146.96362 1176.7448,65.53776 1087.9999,52.038818 c -16.8437,-2.562093 -35.3522,-2.3007 -52,1.396078 -10.7737,2.392415 -22.0835,9.318847 -33.3333,7.489014 -19.21695,-3.125733 -35.96272,-11.545492 -55.99999,-12.50114 -63.55761,-3.031331 -154.3894,30.578613 -173.20857,98.2439 -4.5376,16.31502 -2.57731,33.88842 4.11654,49.33333 3.7338,8.61515 11.57568,17.05273 12.23698,26.66667 0.84708,12.31518 -6.52889,26.36059 -8.36898,38.66666 -3.43547,22.97575 -2.77596,46.17957 -2.77596,69.33334 z"
-         id="path8797" />
-      <path
-         style="fill:#1f0d01;stroke:none"
-         d="M 331.99998,874.66667 C 326.36971,853.71134 320.79922,832.75138 314.44446,812 c -3.98787,-13.02238 -10.09967,-26.27327 -10.9611,-40 -1.36816,-21.80151 10.12443,-41.76676 9.229,-64 -1.07794,-26.76506 3.83187,-73.47038 32.63975,-84.86593 13.22078,-5.22973 30.07772,-3.50484 43.9812,-2.60335 21.26009,1.37854 42.68921,2.68433 64,2.00362 13.84163,-0.44214 31.94921,-1.16715 42.69421,-11.1123 19.80338,-18.32927 2.4587,-44.05676 0.87015,-64.73942 -1.14095,-14.85543 33.68177,-37.19389 5.59591,-49.41529 -3.33309,-1.45035 -6.9412,-1.98738 -10.49361,-2.60066 12.94092,-2.83041 27.70906,-8.49764 28.69429,-24.01599 0.46957,-7.39629 -3.99532,-15.01441 -0.29223,-22.10149 8.44779,-16.16756 33.6361,-5.32885 42.02795,-22.35046 6.45345,-13.08984 -2.22457,-28.16471 -8.45056,-39.53206 -12.7961,-23.36292 -32.80457,-49.28736 -37.40332,-76 -3.62777,-21.07235 10.31502,-42.47897 9.37842,-64 C 524.87582,221.88062 512.84693,199.24276 505.58884,176 500.08416,158.37223 505.70179,140.3396 498.10076,122.66675 481.70887,84.554687 427.30755,60.378337 389.33331,50.966471 366.64052,45.342122 343.26003,43.739746 319.99998,42.394857 251.20911,38.417318 169.26332,42.934001 110.66666,83.377767 69.92654,111.49683 43.182116,157.7216 32.17731,205.33333 c -6.111989,26.4432 -8.251512,54.25716 -6.379221,81.33334 3.063721,44.30607 19.142368,93.85852 39.702639,133.17134 5.349182,10.22807 15.245641,15.58797 22.127471,24.49943 8.336659,10.79533 12.700101,26.31165 14.513331,39.66256 4.60025,33.87183 -10.544235,67.52421 -27.425424,96 -7.070791,11.92725 -26.380995,30.46826 -19.293568,45.29797 6.328765,13.24231 21.87802,22.28325 33.91079,29.67342 21.730792,13.3464 42.852682,25.98442 62.666662,42.21334 65.68961,53.80404 117.5131,120.80567 179.99999,177.48194 z"
-         id="path8795" />
-    </g>
-  </g>
-</svg>
+<svg width="1333" height="1333" xmlns="http://www.w3.org/2000/svg"><path style="fill:#7f7f7f;stroke:none" d="M776.088 517.067c-12 1-21 0-31-6 8 11 16 16 29 18-12 20-28 36-45 53-7 7-19 17-18 28 1 15 22 18 24 32 4 18-17 28 6 41v2c-25 11 4 26 7 40 5 24-13 43 16 60 45 25 103-7 149 15 30 14 46 50 55 79 25 78 13 152-14 227 35-6 69.0001-11 96.0001-35 22-20 34-46 51-70 22-33 54-63 91-78-11-11-23-21-32-34-28-41-46-96-47-146 22 2 43 2 64-4 19-6 37-16 53-28 96-72 97-201 51-301-36-77-107-158-196-172-17-3-35-2-52 1-11 3-22 10-33 8-20-3-36-12-56-13-64-3-155 31-174 99-4 16-2 34 5 49 3 9 11 17 12 27 1 12-7 26-9 38-3 23-2 47-2 70zm-447 544-18-63c-4-13-10-26-11-40-1-22 11-42 10-64-1-27 4-73 32-85 14-5 30-3 44-2l64 2c14-1 32-2 43-12 20-18 2-44 1-64-1-15 34-38 5-50l-10-2c13-3 28-9 29-24 0-8-4-15-1-22 9-17 34-6 42-23 7-13-2-28-8-39-13-24-33-50-37-76-4-21 10-43 9-64-1-25-13-48-20-71-6-18 0-36-8-53-16-38-71-63-109-72-22-6-46-7-69-9-69-4-151 1-209 41-41 28-68 75-79 122-6 27-8 55-6 82 3 44 19 94 40 133 5 10 15 15 22 24 8 11 12 27 14 40 5 34-10 68-27 96-7 12-27 30-20 45 7 14 22 23 34 30 22 13 43 26 63 42 66 54 118 121 180 178z"/></svg>