Switch to Alpine and reduce file size

Author: CPlusPatch

Dockerfile

@@ -1,9 +1,29 @@
-FROM postgres:16
+FROM postgres:16-alpine AS env-build
 
-RUN apt-get update && apt-get -y install git build-essential postgresql-server-dev-16
-RUN postgres --version
-RUN git clone https://github.com/fboulnois/pg_uuidv7
-RUN cd pg_uuidv7 && make && make install && ls -la
+RUN apk add --no-cache build-base postgresql-dev git
+
+WORKDIR /srv
+# Copy contents of https://github.com/fboulnois/pg_uuidv7.git into srv
+RUN git clone https://github.com/fboulnois/pg_uuidv7.git .
+COPY pg_buildext .
+
+# build extension for all supported versions
+RUN /bin/sh pg_buildext build-16 16
+
+# create tarball and checksums
+RUN cp sql/pg_uuidv7--1.5.sql . && TARGETS=$(find * -name pg_uuidv7.so) \
+  && tar -czvf pg_uuidv7.tar.gz $TARGETS pg_uuidv7--1.5.sql pg_uuidv7.control \
+  && sha256sum pg_uuidv7.tar.gz $TARGETS pg_uuidv7--1.5.sql pg_uuidv7.control > SHA256SUMS
+
+FROM postgres:16-alpine AS env-deploy
+
+# copy tarball and checksums
+COPY --from=0 /srv/pg_uuidv7.tar.gz /srv/SHA256SUMS /srv/
+
+# add extension to postgres
+COPY --from=0 /srv/${PG_MAJOR}/pg_uuidv7.so /usr/local/lib/postgresql/pg_uuidv7
+COPY --from=0 /srv/pg_uuidv7.control /usr/local/share/postgresql/extension
+COPY --from=0 /srv/pg_uuidv7--1.5.sql /usr/local/share/postgresql/extension
 
 # Add a script to run the CREATE EXTENSION command
 RUN printf '#!/bin/sh\npsql -U "$POSTGRES_USER" -d "$POSTGRES_DB" -c "CREATE EXTENSION pg_uuidv7;"' > /docker-entrypoint-initdb.d/init.sh