Dockerfile code improvements and labeles added.

Dockerfile code improvements and labeles added.
The improvements include using bash as default shell
for bettter error detection while performing install
and start of container.

Signed-off-by: Milosz Linkiewicz <[email protected]>

Dockerfile

@@ -1,11 +1,21 @@
 FROM alpine:3.18
 
 # set version label
-ARG BUILD_DATE
-ARG VERSION
-ARG WEBAPP_VERSION
-LABEL build_version="netboot.xyz version: ${VERSION} Build-date: ${BUILD_DATE}"
-LABEL maintainer="antonym"
+ARG BUILD_DATE="10/7/2024"
+ARG VERSION="0.7.3"
+ARG WEBAPP_VERSION="0.7.3"
+
+LABEL org.opencontainers.image.authors="[email protected]"
+LABEL org.opencontainers.image.url="https://github.com/netbootxyz/webapp"
+LABEL org.opencontainers.image.title="NetBoot.xyz WebApp"
+LABEL org.opencontainers.image.description="NetBoot.xyz WebApp: A NodeJS helper application for managing local deployments of netboot.xyz"
+LABEL org.opencontainers.image.documentation="https://netboot.xyz/docs/docker"
+LABEL org.opencontainers.image.version="${WEBAPP_VERSION}"
+LABEL org.opencontainers.image.vendor="https://NetBoot.xyz"
+LABEL org.opencontainers.image.licenses="Apache-2.0 license"
+
+RUN apk add --no-cache bash
+SHELL ["/bin/bash", "-e", "-o", "pipefail", "-c"]
 
 RUN \
  apk upgrade --no-cache && \
@@ -26,15 +36,13 @@ RUN \
         supervisor \
         syslog-ng \
         tar \
-        tftp-hpa
-
-RUN \
+        tftp-hpa && \
  groupmod -g 1000 users && \
  useradd -u 911 -U -d /config -s /bin/false nbxyz && \
  usermod -G users nbxyz && \
  mkdir /app \
        /config \
-       /defaults 
+       /defaults
 
 COPY . /app
 
@@ -43,10 +51,12 @@ RUN \
 
 ENV TFTPD_OPTS=''
 
-EXPOSE 3000
-EXPOSE 8080
+EXPOSE 69/UDP 80/TCP 3000/TCP 8080/TCP
+VOLUME ["/assets", "/config"]
 
 COPY root/ /
+CMD ["/start.sh"]
+SHELL ["/bin/bash", "-c"]
 
 # default command
-CMD ["sh","/start.sh"]
+ENTRYPOINT ["/start.sh"]