Use read-only source mounts in Linux docker builds

Author: asfernandes

builds/docker/linux/arm32-arm64/run-arm32.sh

@@ -3,6 +3,6 @@ mkdir -p `pwd`/../../../../gen
 docker run --platform arm --rm \
 	-e CTNG_UID=${CTNG_UID:-$(id -u)} \
 	-e CTNG_GID=${CTNG_GID:-$(id -g)} \
-	-v `pwd`/../../../..:/firebird \
+	-v `pwd`/../../../..:/firebird:ro \
 	-v `pwd`/../../../../gen:/home/ctng/firebird-build/gen \
 	-t firebirdsql/firebird-builder-linux:fb6-arm32-ng-v2

builds/docker/linux/arm32-arm64/run-arm64.sh

@@ -3,6 +3,6 @@ mkdir -p `pwd`/../../../../gen
 docker run --platform arm64 --rm \
 	-e CTNG_UID=${CTNG_UID:-$(id -u)} \
 	-e CTNG_GID=${CTNG_GID:-$(id -g)} \
-	-v `pwd`/../../../..:/firebird \
+	-v `pwd`/../../../..:/firebird:ro \
 	-v `pwd`/../../../../gen:/home/ctng/firebird-build/gen \
 	-t firebirdsql/firebird-builder-linux:fb6-arm64-ng-v2

builds/docker/linux/x86-x64/run-x64.sh

@@ -3,6 +3,6 @@ mkdir -p `pwd`/../../../../gen
 docker run --platform amd64 --rm \
 	-e CTNG_UID=${CTNG_UID:-$(id -u)} \
 	-e CTNG_GID=${CTNG_GID:-$(id -g)} \
-	-v `pwd`/../../../..:/firebird \
+	-v `pwd`/../../../..:/firebird:ro \
 	-v `pwd`/../../../../gen:/home/ctng/firebird-build/gen \
 	-t firebirdsql/firebird-builder-linux:fb6-x64-ng-v2

builds/docker/linux/x86-x64/run-x86.sh

@@ -3,6 +3,6 @@ mkdir -p `pwd`/../../../../gen
 docker run --platform i386 --rm \
 	-e CTNG_UID=${CTNG_UID:-$(id -u)} \
 	-e CTNG_GID=${CTNG_GID:-$(id -g)} \
-	-v `pwd`/../../../..:/firebird \
+	-v `pwd`/../../../..:/firebird:ro \
 	-v `pwd`/../../../../gen:/home/ctng/firebird-build/gen \
 	-t firebirdsql/firebird-builder-linux:fb6-x86-ng-v2