Add authenticated photo uploads and GitHub Actions publishing

Gemfile.lock

@@ -41,8 +41,6 @@ GEM
       rouge (~> 3.0)
       safe_yaml (~> 1.0)
       terminal-table (~> 2.0)
-    jekyll-latex (1.1.0)
-      polytexnic (~> 1.6)
     jekyll-sass-converter (2.2.0)
       sassc (> 2.0.1, < 3.0)
     jekyll-scholar (7.1.0)
@@ -52,7 +50,6 @@ GEM
       jekyll (~> 4.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    json (2.3.1)
     kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
@@ -64,21 +61,13 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
     mini_portile2 (2.8.0)
-    msgpack (1.2.10)
     namae (1.1.1)
     nokogiri (1.13.6)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    polytexnic (1.7.3)
-      json (~> 2.3.0)
-      kramdown (>= 2.0, < 3.0)
-      msgpack (~> 1.2.0)
-      nokogiri (>= 1.6.0, < 2.0)
-      pygments.rb (~> 2.1)
     public_suffix (4.0.7)
-    pygments.rb (2.3.0)
     racc (1.6.0)
     rb-fsevent (0.11.1)
     rb-inotify (0.10.1)
@@ -98,7 +87,6 @@ PLATFORMS
 
 DEPENDENCIES
   jekyll
-  jekyll-latex
   jekyll-scholar
   nokogiri
   webrick (~> 1.7)