Use lighttpd instead of Caddy

- lighttpd is lighter for this use case (few static files)
- use a vanilla alpine base image
- use a dedicated venv as system one is restricted
- remove apk-tools and ca-certificates to save some disk space on image

dashboard/Dockerfile

@@ -1,55 +1,61 @@
-FROM caddy:2.7.4-alpine
+FROM alpine:3.19
 LABEL org.opencontainers.image.source https://github.com/offspot/container-images
 
 RUN \
-    apk add --no-cache curl dumb-init yaml python3 py3-pip && \
+    apk add --no-cache curl dumb-init yaml python3 lighttpd \
     # Fira font
-    mkdir -p /var/www/assets/fira && \
-    curl -L -O https://github.com/mozilla/Fira/archive/refs/tags/4.202.zip && \
-        unzip -j -o 4.202.zip \
+    && mkdir -p /var/www/assets/fira \
+    && curl -L -O https://github.com/mozilla/Fira/archive/refs/tags/4.202.zip \
+        && unzip -j -o 4.202.zip \
             Fira-4.202/eot/FiraSans-Bold.eot \
             Fira-4.202/eot/FiraSans-Regular.eot \
             Fira-4.202/ttf/FiraSans-Bold.ttf \
             Fira-4.202/ttf/FiraSans-Regular.ttf \
             Fira-4.202/woff/FiraSans-Bold.woff \
             Fira-4.202/woff/FiraSans-Regular.woff \
-            -d /var/www/assets/fira && \
-            rm -f 4.202.zip && \
+            -d /var/www/assets/fira \
+            && rm -f 4.202.zip \
     # FontAwesome font
-    curl -L -O https://use.fontawesome.com/releases/v6.2.0/fontawesome-free-6.2.0-web.zip && \
-        unzip -o fontawesome-free-6.2.0-web.zip \
+    && curl -L -O https://use.fontawesome.com/releases/v6.2.0/fontawesome-free-6.2.0-web.zip \
+        && unzip -o fontawesome-free-6.2.0-web.zip \
             fontawesome-free-6.2.0-web/css/* \
             fontawesome-free-6.2.0-web/webfonts/* \
-            -d /var/www/assets/ && \
-        mv /var/www/assets/fontawesome-free-6.2.0-web /var/www/assets/fontawesome && \
-        rm -f fontawesome-free-6.2.0-web.zip && \
+            -d /var/www/assets/ \
+        && mv /var/www/assets/fontawesome-free-6.2.0-web /var/www/assets/fontawesome \
+        && rm -f fontawesome-free-6.2.0-web.zip \
     # Pure CSS
-    curl \
+    && curl \
         -L -o /var/www/assets/pure-min.css \
-        https://cdn.jsdelivr.net/npm/[email protected]/build/pure-min.css && \
-    curl \
+        https://cdn.jsdelivr.net/npm/[email protected]/build/pure-min.css \
+    && curl \
         -L -o /var/www/assets/grids-responsive-min.css \
-        https://cdn.jsdelivr.net/npm/[email protected]/build/grids-responsive-min.css && \
+        https://cdn.jsdelivr.net/npm/[email protected]/build/grids-responsive-min.css \
     # python dependencies
-    pip3 install --no-cache-dir -U pip && \
-    pip3 install \
+    && python3 -m venv /usr/local/bin/gen-home_env \
+    && /usr/local/bin/gen-home_env/bin/pip3 install --no-cache-dir -U pip \
+    && /usr/local/bin/gen-home_env/bin/pip3 install \
         --no-cache-dir \
-        Jinja2==3.1.2 PyYAML==6.0.1 humanfriendly==10.0 && \
-    apk del curl
+        Jinja2==3.1.2 PyYAML==6.0.1 humanfriendly==10.0 \
+    && apk del curl
 
 ENV FQDN "generic.hotspot"
 ENV NAME "My Hotspot"
 
+# WARN: this break apk but saves a lot of space
+# it's OK on prod but comment it during dev if you need packages
+RUN apk del apk-tools ca-certificates-bundle
+
 COPY Caddyfile /etc/caddy/
 COPY gen-home.py /src/
 COPY templates /src/templates
 COPY assets /var/www/assets
 COPY fallback.html /var/www/fallback.html
 COPY home.yaml /src/
+COPY lighttpd.conf /etc/lighttpd/
 
 # store python bytecode in image
-RUN python3 -m compileall /src/gen-home.py && mv /src/__pycache__/*.pyc /usr/local/lib/
+RUN /usr/local/bin/gen-home_env/bin/python3 -m compileall /src/gen-home.py && mv /src/__pycache__/*.pyc /usr/local/bin/gen-home_env/lib/
 
-ENTRYPOINT ["/usr/bin/dumb-init", "--", "/usr/bin/python3", "/usr/local/lib/gen-home.cpython-311.pyc"]
-CMD ["caddy", "run", "--config", "/etc/caddy/Caddyfile"]
+ENTRYPOINT ["/usr/bin/dumb-init", "--", "/usr/local/bin/gen-home_env/bin/python3", "/usr/local/bin/gen-home_env/lib/gen-home.cpython-311.pyc"]
+CMD ["lighttpd", "-D", "-f", "/etc/lighttpd/lighttpd.conf"]
 

dashboard/lighttpd.conf

@@ -0,0 +1,2 @@
+server.document-root = "/var/www/"
+index-file.names = ( "index.html", "fallback.html" )