building docker container should use the cpanfile.snapshot

Author: haarg

Dockerfile

@@ -42,7 +42,7 @@ COPY cpanfile cpanfile.snapshot ./
 RUN \
     --mount=type=cache,target=/root/.perl-cpm,sharing=private \
 <<EOT /bin/bash -euo pipefail
-    cpm install --show-build-log-on-failure
+    cpm install --show-build-log-on-failure --resolver=snapshot
 EOT
 
 RUN mkdir var && chown metacpan:users var
@@ -76,7 +76,7 @@ USER root
 RUN \
     --mount=type=cache,target=/root/.perl-cpm \
 <<EOT /bin/bash -euo pipefail
-    cpm install --with-develop
+    cpm install --show-build-log-on-failure --resolver=snapshot --with-develop
     chown -R metacpan:users ./
 EOT
 
@@ -118,7 +118,7 @@ EOT
 RUN \
     --mount=type=cache,target=/root/.perl-cpm \
 <<EOT /bin/bash -euo pipefail
-    cpm install --show-build-log-on-failure --with-test
+    cpm install --show-build-log-on-failure --resolver=snapshot --with-test
 EOT
 
 COPY .perlcriticrc .perltidyrc perlimports.toml tidyall.ini ./