trimming down images

dockerfiles/exporter

@@ -1,4 +1,4 @@
-FROM golang:bullseye
+FROM golang:bullseye as OG
 
 # Install exporter from Golang source
 RUN go install github.com/cirocosta/monero-exporter/cmd/monero-exporter@master

dockerfiles/wownerod

@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM ubuntu:22.04 as OG
 
 # Update system and install dependencies
 # Download Wownero binaries from Gitea
@@ -33,6 +33,10 @@ RUN echo "${WOWNERO_HASH}  ${WOWNERO_DL_FILE}" > ${WOWNERO_SUMS_FILE} \
   && install ./tmp/wownero* /usr/local/bin/ \
   && rm -rf ./tmp ${WOWNERO_SUMS_FILE} ${WOWNERO_DL_FILE}
 
+# Copy to fresh Ubuntu image to reduce size
+FROM ubuntu:22.04
+COPY --from=OG /usr/local/bin/wownerod /usr/local/bin/wownerod
+
 WORKDIR /data
 
 EXPOSE 34567