docker images: clean kill using tini

- PID 1 does not have default signal handlers which causes
unclean shutdown of processes
Signed-off-by: Lakshya Singh <lakshay.singh1108@gmail.com>

bitcoind/Dockerfile

@@ -103,7 +103,8 @@ RUN apk --no-cache add \
   boost-thread \
   sqlite-dev \
   libevent \
-  libzmq
+  libzmq \
+  tini
 
 ARG BITCOIN_VERSION
 ARG BITCOIN_PREFIX=/opt/bitcoin-${BITCOIN_VERSION}
@@ -129,7 +130,7 @@ VOLUME ["${BITCOIN_DATA}"]
 
 USER bitcoin
 
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["/sbin/tini", "--", "/entrypoint.sh"]
 
 RUN bitcoind -version | grep "Bitcoin Core version v${BITCOIN_VERSION}"
 

lightningd/Dockerfile

@@ -113,7 +113,8 @@ RUN apk update && \
       bind-tools \
       libev-dev \
       curl-dev \
-      sqlite-dev
+      sqlite-dev \
+      tini
 
 ARG LIGHTNINGD_UID=101 \
     LIGHTNINGD_USER=lightning
@@ -164,5 +165,5 @@ RUN pip3 install \
 HEALTHCHECK --interval=5s --timeout=10s --start-period=5s \
     CMD ["/healthcheck.sh"]
 
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["/sbin/tini", "--", "/entrypoint.sh"]
 CMD ["lightningd"]

txood/Dockerfile

@@ -32,7 +32,8 @@ RUN apk update && \
       libev-dev \
       curl-dev \
       curl \
-      jq
+      jq \
+      tini
 
 COPY --from=builder /usr/local/bin/txood /usr/bin/txood
 
@@ -47,5 +48,5 @@ VOLUME ["${TXOO_DATA}"]
 HEALTHCHECK --interval=5s --timeout=10s --start-period=5s \
     CMD ["/healthcheck.sh"]
 
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["/sbin/tini", "--", "/entrypoint.sh"]
 CMD ["txood"]

vlsd/Dockerfile

@@ -38,7 +38,8 @@ RUN apk update && \
   build-base \
   curl-dev \
   protobuf \
-  bind-tools
+  bind-tools \
+  tini
 
 COPY --from=builder /usr/local/bin/vlsd2 /usr/local/bin/vlsd2
 COPY --from=builder /usr/local/bin/vls-cli /usr/local/bin/vls-cli
@@ -65,7 +66,7 @@ USER vls
 HEALTHCHECK --interval=10s --timeout=10s --start-period=10s \
     CMD ["/healthcheck.sh"]
 
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["/sbin/tini", "--", "/entrypoint.sh"]
 
 RUN vlsd2 --git-desc