fix(container): put $(go env GOPATH)/bin on PATH for templ

Previous run failed with `bash: line 5: templ: command not found`
(exit 127). `go install` drops into $(go env GOPATH)/bin and the bash
shell that build-container.yml spawns for pre-build-command doesn't
inherit that on PATH. Prepend it between install and invocation.

Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>

Author: CybotTM

.github/workflows/container.yml

@@ -61,6 +61,10 @@ jobs:
 
         echo "::group::install templ + generate"
         go install github.com/a-h/templ/cmd/templ@latest
+        # `go install` drops binaries into $(go env GOPATH)/bin, which is
+        # not on PATH for the ad-hoc bash shell the reusable
+        # build-container.yml spawns for pre-build-command. Add it.
+        export PATH="$(go env GOPATH)/bin:${PATH}"
         templ generate
         echo "::endgroup::"