Installing TA-lib on an Ubuntu server has its challenges as not only the python library has to be installed but the product should be downloaded and compiled first. Use the following steps to perform the installation:

mkdir -p /app
sudo apt-get install build-essential autoconf libtool pkg-config python3-dev -y
cd /app
sudo wget http://prdownloads.sourceforge.net/ta-lib/ta-lib-0.4.0-src.tar.gz
sudo tar -xzf ta-lib-0.4.0-src.tar.gz
cd ta-lib/
sudo ./configure
sudo make
sudo make install
sudo pip3 install --upgrade pip
sudo pip3 install TA-Lib

In case you would be using gitlab pipelines you can use the following job to do the same:

 stages:
   - prepare

 prepare:
   stage: prepare
   script:
     - mkdir -p /app
     - sudo apt-get install build-essential autoconf libtool pkg-config       python3-dev -y
     - cd /app
     - sudo wget http://prdownloads.sourceforge.net/ta-lib/ta-lib-0.4.0-src.tar.gz
     - sudo tar -xzf ta-lib-0.4.0-src.tar.gz
     - cd ta-lib/
     - sudo ./configure
     - sudo make
     - sudo make install
     - sudo pip3 install --upgrade pip
     - sudo pip3 install TA-Lib

Happy trading!