add docker setup for hosting the repo

hosting/Dockerfile

@@ -0,0 +1,15 @@
+# Use lightweight Nginx + Git
+FROM nginx:alpine
+
+# Install git and bash
+RUN apk add --no-cache git bash
+
+# Copy nginx config
+COPY nginx.conf /etc/nginx/nginx.conf
+
+# Copy update script
+COPY update.sh /update.sh
+RUN chmod +x /update.sh
+
+# Start update loop + nginx
+CMD ["/bin/bash", "-c", "/update.sh & nginx -g 'daemon off;'"]

hosting/nginx.conf

@@ -0,0 +1,17 @@
+events {}
+http {
+    server {
+        listen 80;
+        server_name = fdroid.julian-mutter.de;
+
+        location = / {
+            return 302 /fdroid/repo;
+        }
+
+        location /fdroid/repo {
+            alias /repo/fdroid/repo/;
+            autoindex on;
+        }
+    }
+}
+

hosting/update.sh

@@ -0,0 +1,25 @@
+#! /bin/bash
+
+if [ ! -d "/repo/.git" ]; then
+    echo "Cloning repository..."
+    git clone --branch "$BRANCH" "$REPO_URL" "/repo"
+fi
+
+while true; do
+    echo "Running repo update..."
+
+    cd "/repo" || exit
+    git fetch origin
+    LOCAL=$(git rev-parse HEAD)
+    REMOTE=$(git rev-parse origin/binaries)
+
+    if [ "$LOCAL" != "$REMOTE" ]; then
+        echo "Updating repo..."
+        git reset --hard origin/binaries
+        echo "Update complete."
+    else
+        echo "Nothing to do."
+    fi
+
+    sleep 600 # check every 10 min
+done