Fix build.sh to run dependencies_check prior to using curl. (#299)

build.sh

@@ -197,6 +197,8 @@ source "${SCRIPT_DIR}/common"
 # shellcheck source=scripts/dependencies_check
 source "${SCRIPT_DIR}/dependencies_check"
 
+dependencies_check "${BASE_DIR}/depends"
+
 #check username is valid
 if [[ ! "$FIRST_USER_NAME" =~ ^[a-z][-a-z0-9_]*$ ]]; then
 	echo "Invalid FIRST_USER_NAME: $FIRST_USER_NAME"
@@ -208,8 +210,6 @@ if [[ -n "${APT_PROXY}" ]] && ! curl --silent "${APT_PROXY}" >/dev/null ; then
 	exit 1
 fi
 
-dependencies_check "${BASE_DIR}/depends"
-
 mkdir -p "${WORK_DIR}"
 log "Begin ${BASE_DIR}"