Fix broken images build due to multipart-post gem

Maximum supported version of multipart-post, with the current images Ruby & RubyGems is 2.2.0.
Forcing the 2.2.0 version.

Signed-off-by: Vasyl Razinkov <vasyl.razinkov@est.tech>
Change-Id: Ie7a7232be817f005c36f09b023344b479c64457f
Issue-ID: SDC-4041
diff --git a/catalog-fe/sdc-frontend/Dockerfile b/catalog-fe/sdc-frontend/Dockerfile
index d0978a9..a860623 100644
--- a/catalog-fe/sdc-frontend/Dockerfile
+++ b/catalog-fe/sdc-frontend/Dockerfile
@@ -12,6 +12,7 @@
         ruby-dev \
         libffi-dev \
         libxml2-dev && \
+    gem install multipart-post -v 2.2.0 --no-document && \
     gem install chef:13.8.5 berkshelf:6.3.1 io-console:0.4.6 etc webrick --no-document && \
     gem cleanup && \
     apk update
@@ -40,4 +41,4 @@
 
 RUN chmod 770 $JETTY_FOLDER/startup.sh
 
-ENTRYPOINT [ "sh", "-c", "${JETTY_HOME}/startup.sh"]
\ No newline at end of file
+ENTRYPOINT [ "sh", "-c", "${JETTY_HOME}/startup.sh"]