fix syntax on ENV directive in Dockerfiles

Author: justdave

Dockerfile

@@ -1,7 +1,7 @@
 ARG BZDB="-mysql"
 FROM bugzilla/bugzilla-perl-slim${BZDB}:20250925.1
 
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 
 ENV LOG4PERL_CONFIG_FILE=log4perl-json.conf
 

docker/images/Dockerfile.bugzilla-perl-slim

@@ -43,7 +43,7 @@ RUN find local -name '*.so' -exec ldd {} \; \
 
 FROM perl:5.38.2-slim
 
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 
 COPY --from=builder /app/local /app/local
 COPY --from=builder /app/PACKAGES /app/PACKAGES

docker/images/Dockerfile.bugzilla-perl-slim-mariadb

@@ -40,7 +40,7 @@ RUN find local -name '*.so' -exec ldd {} \; \
 
 FROM bugzilla/bugzilla-perl-slim:20250925.1
 
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 
 COPY --from=builder /app/local /app/local
 COPY --from=builder /app/PACKAGES /app/PACKAGES

docker/images/Dockerfile.bugzilla-perl-slim-mysql

@@ -50,7 +50,7 @@ RUN find local -name '*.so' -exec ldd {} \; \
 
 FROM bugzilla/bugzilla-perl-slim:20250925.1
 
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 
 COPY --from=builder /app/local /app/local
 COPY --from=builder /app/PACKAGES /app/PACKAGES

docker/images/Dockerfile.bugzilla-perl-slim-pg

@@ -51,7 +51,7 @@ RUN find local -name '*.so' -exec ldd {} \; \
 # developer tools
 FROM bugzilla/bugzilla-perl-slim:20250925.1
 
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 
 # copy the stuff we built over from the temporary image
 COPY --from=builder /app/local /app/local