software/theia: Overwrite static logo and fonts

Before this commit buildout could fail when instantiating Theia after
updating to a new software release because it tried to create already
existing symbolic links. These symlinks were to let the backend Caddy
serve the logo and fonts.

This commit solves the issue by systematically overwriting existing
files when creating the symlinks, and also directly copies the logo.

software/theia/buildout.hash.cfg

@@ -15,7 +15,7 @@
 
 [instance]
 filename = instance.cfg.in
-md5sum = ec1d3d947222354d73a94eb974f46d66
+md5sum = 7cdff4ef4e8a7d1ac5f529865a7d8c6a
 
 [yarn.lock]
 filename = yarn.lock

software/theia/instance.cfg.in

@@ -220,9 +220,9 @@ recipe = plone.recipe.command
 location = $${directory:frontend-static}/$${:folder-name}
 folder-name = fonts
 command =
-  mkdir $${:location}
-  ln -s ${source-code-pro-fonts:location} $${:location}/source-code-pro
-  ln -s ${jetbrains-mono-fonts:location} $${:location}/jetbrains-mono
+  mkdir -p $${:location}
+  ln -sf ${source-code-pro-fonts:location} $${:location}/source-code-pro
+  ln -sf ${jetbrains-mono-fonts:location} $${:location}/jetbrains-mono
 stop-on-error = true
 
 [frontend-instance-logo]
@@ -230,10 +230,7 @@ recipe = plone.recipe.command
 filename = logo.png
 full-path = $${directory:frontend-static}/$${:filename}
 command =
-  if [ ! -e $${:full-path} ]
-  then
-    ln -s ${logo.png:output} $${:full-path}
-  fi
+  cp -f ${logo.png:output} $${:full-path}
 stop-on-error = true
 
 [frontend-instance-slapos.css]