Re-implement Docker workflow using GitHub Actions (#326)

* Recreate a docker dir with all docker files inside and add init.sh
* Add docker/README.md with example docker-compose.xml
* Add mysql vars for mempool-config.json
* Port can be set from env var in docker-compose.xml
* Update docker-compose.xml example to use latest tag
* Remove armv7 architecture from build workflow
* Remove master git-hash file
* Remove useless ':' in sed

docker/frontend/Dockerfile

@@ -0,0 +1,34 @@
+FROM node:12-buster-slim AS builder
+
+WORKDIR /build
+COPY . .
+RUN apt-get update
+RUN apt-get install -y build-essential rsync
+RUN npm i
+RUN npm run build
+
+FROM nginx:1.17.8-alpine
+
+WORKDIR /patch
+
+COPY --from=builder /build/entrypoint.sh .
+COPY --from=builder /build/wait-for .
+COPY --from=builder /build/dist/mempool /var/www/mempool
+COPY --from=builder /build/nginx.conf /etc/nginx/
+COPY --from=builder /build/nginx-mempool.conf /etc/nginx/conf.d/
+
+RUN chmod +x /patch/entrypoint.sh
+RUN chmod +x /patch/wait-for
+
+RUN chown -R 1000:1000 /patch && chmod -R 755 /patch && \
+        chown -R 1000:1000 /var/cache/nginx && \
+        chown -R 1000:1000 /var/log/nginx && \
+        chown -R 1000:1000 /etc/nginx/nginx.conf && \
+        chown -R 1000:1000 /etc/nginx/conf.d
+RUN touch /var/run/nginx.pid && \
+        chown -R 1000:1000 /var/run/nginx.pid
+
+USER 1000
+
+ENTRYPOINT ["/patch/entrypoint.sh"]
+CMD ["nginx", "-g", "daemon off;"]

docker/frontend/entrypoint.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+__MEMPOOL_BACKEND_MAINNET_HTTP_HOST__=${BACKEND_MAINNET_HTTP_HOST:=127.0.0.1}
+__MEMPOOL_BACKEND_MAINNET_HTTP_PORT__=${BACKEND_MAINNET_HTTP_PORT:=8999}
+__MEMPOOL_FRONTEND_HTTP_PORT__=${FRONTEND_HTTP_PORT:=8080}
+
+sed -i "s/__MEMPOOL_BACKEND_MAINNET_HTTP_HOST__/${__MEMPOOL_BACKEND_MAINNET_HTTP_HOST__}/g" /etc/nginx/conf.d/nginx-mempool.conf
+sed -i "s/__MEMPOOL_BACKEND_MAINNET_HTTP_PORT__/${__MEMPOOL_BACKEND_MAINNET_HTTP_PORT__}/g" /etc/nginx/conf.d/nginx-mempool.conf
+
+cp /etc/nginx/nginx.conf /patch/nginx.conf
+sed -i "s/__MEMPOOL_FRONTEND_HTTP_PORT__/${__MEMPOOL_FRONTEND_HTTP_PORT__}/g" /patch/nginx.conf
+cat /patch/nginx.conf > /etc/nginx/nginx.conf
+
+exec "$@"

docker/frontend/wait-for

@@ -0,0 +1,84 @@
+#!/bin/sh
+
+TIMEOUT=15
+QUIET=0
+
+echoerr() {
+  if [ "$QUIET" -ne 1 ]; then printf "%s\n" "$*" 1>&2; fi
+}
+
+usage() {
+  exitcode="$1"
+  cat << USAGE >&2
+Usage:
+  $cmdname host:port [-t timeout] [-- command args]
+  -q | --quiet                        Do not output any status messages
+  -t TIMEOUT | --timeout=timeout      Timeout in seconds, zero for no timeout
+  -- COMMAND ARGS                     Execute command with args after the test finishes
+USAGE
+  exit "$exitcode"
+}
+
+wait_for() {
+ if ! command -v nc >/dev/null; then
+    echoerr 'nc command is missing!'
+    exit 1
+  fi
+
+  for i in `seq $TIMEOUT` ; do
+    nc -z "$HOST" "$PORT" > /dev/null 2>&1
+    
+    result=$?
+    if [ $result -eq 0 ] ; then
+      if [ $# -gt 0 ] ; then
+        exec "$@"
+      fi
+      exit 0
+    fi
+    sleep 1
+  done
+  echo "Operation timed out" >&2
+  exit 1
+}
+
+while [ $# -gt 0 ]
+do
+  case "$1" in
+    *:* )
+    HOST=$(printf "%s\n" "$1"| cut -d : -f 1)
+    PORT=$(printf "%s\n" "$1"| cut -d : -f 2)
+    shift 1
+    ;;
+    -q | --quiet)
+    QUIET=1
+    shift 1
+    ;;
+    -t)
+    TIMEOUT="$2"
+    if [ "$TIMEOUT" = "" ]; then break; fi
+    shift 2
+    ;;
+    --timeout=*)
+    TIMEOUT="${1#*=}"
+    shift 1
+    ;;
+    --)
+    shift
+    break
+    ;;
+    --help)
+    usage 0
+    ;;
+    *)
+    echoerr "Unknown argument: $1"
+    usage 1
+    ;;
+  esac
+done
+
+if [ "$HOST" = "" -o "$PORT" = "" ]; then
+  echoerr "Error: you need to provide a host and port to test."
+  usage 2
+fi
+
+wait_for "$@"