fix: add args for builds

Author: featheredtoast

image/base/Dockerfile

@@ -34,6 +34,7 @@ RUN gpg --import /tmp/nginx_public_keys.key &&\
 FROM discourse/ruby:${RUBY_VERSION}-${DEBIAN_RELEASE}-slim AS discourse_dependencies
 
 ARG DEBIAN_RELEASE
+ARG PG_MAJOR
 ENV PG_MAJOR=${PG_MAJOR} \
     RUBY_ALLOCATOR=/usr/lib/libjemalloc.so \
     LEFTHOOK=0 \
@@ -181,6 +182,7 @@ RUN cd /var/www/discourse &&\
     sudo -u discourse /bin/bash -c 'if [ -f yarn.lock ]; then yarn install --frozen-lockfile && yarn cache clean; else pnpm install --frozen-lockfile; fi'
 
 FROM discourse_web_only AS discourse_release
+ARG PG_MAJOR
 RUN --mount=type=tmpfs,target=/var/log \
     postgresql-${PG_MAJOR} postgresql-contrib-${PG_MAJOR} postgresql-${PG_MAJOR}-pgvector \
 RUN /tmp/install-redis

image/discourse_dev/Dockerfile

@@ -10,6 +10,7 @@ USER discourse
 RUN git clone https://github.com/discourse/discourse . --depth 1
 
 FROM discourse/base:$from_tag
+ARG PG_MAJOR=15
 
 #LABEL maintainer="Sam Saffron \"https://twitter.com/samsaffron\""