Fix deployment issues

+ fix node compile-image (to node:16-buster, node.js 16 ver)
+ fix python-dev to python3-dev
+ fix for using some old Python packages (jinja2<3.1.0 , itsdangerous==2.0.1 , werkzeug==2.0.3)

Dockerfile-docsim

@@ -1,4 +1,5 @@
-FROM node:lts-buster AS compile-image
+FROM node:16-buster AS compile-image
+# FROM node:lts-buster AS compile-image
 
 COPY ./ui /app/ui
 
@@ -29,7 +30,8 @@ EXPOSE 5000
 
 RUN apt-get -y clean \
     && apt-get -y update \
-    && apt-get -y install python-dev \
+    # && apt-get -y install python-dev \
+    && apt-get -y install python3-dev \
     && apt-get -y install build-essential \
     && apt-get -y install unzip \
     && apt-get -y install bzip2 \

server/deploy/requirements.txt

@@ -5,6 +5,9 @@
 pdfminer.six==20201018
 pandas==1.1.4
 gensim==3.8.3
+jinja2<3.1.0
+itsdangerous==2.0.1
+werkzeug==2.0.3
 Flask==1.1.2
 flask-cors==3.0.9
 # ------------------------------------------------------------------