dockerfile: reduce interval and env config

- bitcoind and cln reduce healthcheck time interval
- cln healthcheck no need to use switch case instead use VLS_NETWORK
Signed-off-by: Lakshya Singh <lakshay.singh1108@gmail.com>

bitcoind/Dockerfile

@@ -133,7 +133,7 @@ ENTRYPOINT ["/entrypoint.sh"]
 
 RUN bitcoind -version | grep "Bitcoin Core version v${BITCOIN_VERSION}"
 
-HEALTHCHECK --interval=60s --timeout=10s --start-period=30s \
+HEALTHCHECK --interval=10s --timeout=20s --start-period=30s \
   CMD ["/bin/sh", "-c", "/healthcheck.sh"]
 
 CMD ["bitcoind"]