feat(docker): simplify docker compose for end users (#96)

* feat(docker): simplify docker compose for end users

The previous docker-compose requires end user to manually handle
permissions of taskchampion data dir. And this commit has directories
automatically set up in docker-entrypoint.sh, just like what
postgresql did in https://github.com/docker-library/postgres/blob/master/docker-entrypoint.sh

* fix(docker): revert to anonymous data volume for compatibility

* feat: use uid 1092 for taskchampion

* fix(docker): revert mkdir

This is embarrassing that subpaths are not automatically created.

So we still need mkdir service in case of anonymous data volume.

* fix(docker): typo

Dockerfile

@@ -1,19 +1,25 @@
 # Versions must be major.minor
-ARG RUST_VERSION
-ARG ALPINE_VERSION
+# Default versions are as below
+ARG RUST_VERSION=1.78
+ARG ALPINE_VERSION=3.19
 
 FROM docker.io/rust:${RUST_VERSION}-alpine${ALPINE_VERSION} AS builder
-COPY . /data
+COPY Cargo.lock Cargo.toml /data/
+COPY core /data/core/
+COPY server /data/server/
+COPY sqlite /data/sqlite/
 RUN apk -U add libc-dev && \
   cd /data && \
   cargo build --release
 
 FROM docker.io/alpine:${ALPINE_VERSION}
 COPY --from=builder /data/target/release/taskchampion-sync-server /bin
-RUN adduser -S -D -H -h /var/lib/taskchampion-sync-server -s /sbin/nologin -G users \
+RUN apk add --no-cache su-exec && \
+  adduser -u 1092 -S -D -H -h /var/lib/taskchampion-sync-server -s /sbin/nologin -G users \
   -g taskchampion taskchampion && \
-  install -d -m755 -o100 -g100 "/var/lib/taskchampion-sync-server"
+  install -d -m1755 -o1092 -g1092 "/var/lib/taskchampion-sync-server"
 EXPOSE 8080
-VOLUME "/var/lib/taskchampion-sync-server"
-USER taskchampion
-ENTRYPOINT [ "taskchampion-sync-server" ]
+VOLUME /var/lib/task-champion-sync-server/data
+COPY docker-entrypoint.sh /bin
+ENTRYPOINT [ "/bin/docker-entrypoint.sh" ]
+CMD [ "/bin/taskchampion-sync-server" ]