docker: add entrypoint script + env var for configuring

.dockerignore

@@ -4,3 +4,4 @@ dist/
 .*
 *.md
 !.prettier*
+!.eslintrc.cjs

Dockerfile

@@ -19,5 +19,7 @@ FROM nginx:alpine
 
 COPY --from=build /app/dist/ /usr/share/nginx/html/
 COPY docker/nginx.conf /etc/nginx/conf.d/default.conf
+COPY docker/entrypoint.sh /entrypoint.sh
 
 EXPOSE 80
+ENTRYPOINT [ "/entrypoint.sh" ]

Dockerfile.ci

@@ -2,5 +2,7 @@ FROM nginx:alpine
 
 COPY ./dist-ci/ /usr/share/nginx/html/
 COPY docker/nginx.conf /etc/nginx/conf.d/default.conf
+COPY docker/entrypoint.sh /entrypoint.sh
 
 EXPOSE 80
+ENTRYPOINT [ "/entrypoint.sh" ]

docker/entrypoint.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+if [ -z "$BACKEND_HOSTNAME" ]; then
+    echo "BACKEND_HOSTNAME not set"
+    exit 1
+fi
+
+sed -i s/pipedapi.kavin.rocks/"$BACKEND_HOSTNAME"/g /usr/share/nginx/html/assets/*
+nginx -g "daemon off;"