Fixes in SH scripts

scripts/build_docker_image.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
 set -e
-docker build -t "${LIGO_REGISTRY_IMAGE_BUILD:-ligolang/ligo}:next" -f ./docker/distribution/debian/distribute.Dockerfile .
+docker build -t "${LIGO_REGISTRY_IMAGE_BUILD:-ligolang/ligo}:next" -f ./docker/distribution/debian/distribute.Dockerfile .

scripts/distribution/generic/build.sh

@@ -1,4 +1,5 @@
 #!/bin/sh
+set -e
 
 dockerfile_name="build"
 # Generic dockerfile

scripts/distribution/generic/package.sh

@@ -1,4 +1,5 @@
 #!/bin/sh
+set -e
 
 dockerfile_name="package"
 dockerfile=""

scripts/distribution/generic/parameters.sh

@@ -1,11 +1,14 @@
+#!/bin/sh
+set -e
+
 # This script accepts three arguments, os family, os and its version,
 # which are subsequently used to fetch the respective docker
 # image from the ocaml/infrastructure project.
 #
 # https://github.com/ocaml/infrastructure/wiki/Containers#selecting-linux-distributions
-target_os_family=$1
-target_os=$2
-target_os_version=$3
+target_os_family="$1"
+target_os="$2"
+target_os_version="$3"
 
 # Variables configured at the CI level
 dist="$LIGO_DIST_DIR"
@@ -29,4 +32,4 @@ fi
 target_os_specific_dockerfile="./docker/distribution/$target_os_family/$target_os/$dockerfile_name.Dockerfile"
 if test -f "$target_os_specific_dockerfile"; then
     dockerfile="$target_os_specific_dockerfile"
-fi
+fi