NONRTRIC-955: Fix unit test 404 issue

Issue-Id: NONRTRIC-955
Signed-off-by: DenisGNoonan <denis.noonan@est.tech>
Change-Id: I36e234937630a9051abb01ad82ad7bc1186ff49c
diff --git a/near-rt-ric-simulator/Dockerfile b/near-rt-ric-simulator/Dockerfile
index 786b003..4407f8c 100644
--- a/near-rt-ric-simulator/Dockerfile
+++ b/near-rt-ric-simulator/Dockerfile
@@ -20,7 +20,7 @@
 
 RUN apk add --update --no-cache python3=3.10.13-r0 py3-pip nginx nginx-mod-http-lua
 
-RUN pip3 install Flask connexion[swagger-ui,flask,uvicorn]
+RUN pip3 install Flask==2.2.5 connexion[swagger-ui,flask]==2.14.2
 
 WORKDIR /usr/src/app