Refactor/pdftotext as library (#183)

- Update Docker Ubuntu to 22.04
- Test pipeline now installs fresh Poppler
- Poppler-utils package no longer needed
- Paragraph on project dependencies added to CONTRIBUTING.md
- Pdftotext is no longer called with subprocess call, but API is leveraged instead

1 files changed, 3 insertions, 4 deletions

diff --git a/docker/Dockerfile b/docker/Dockerfile
index 3efb0465..c691716c 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu
+FROM ubuntu:jammy
 
 ENV USER="user"
 ENV HOME /home/${USER}
@@ -10,13 +10,11 @@ RUN apt-get install python3-pip -y
 RUN apt-get install python3-venv -y
 RUN apt-get install git -y
 RUN apt-get install curl -y
-RUN apt-get install python3.8-venv -y
 
 # Install dependencies fo PyPDF2 and pdftotext
 RUN DEBIAN_FRONTEND="noninteractive" apt-get -y install tzdata
-RUN apt-get install build-essential libpoppler-cpp-dev pkg-config python3-dev poppler-utils -y
+RUN apt-get install build-essential libpoppler-cpp-dev pkg-config python3-dev -y
 RUN apt-get install libqpdf-dev -y
-RUN apt-get install pkg-config -y
 RUN apt-get install default-jdk -y
 RUN apt-get install graphviz -y
 
@@ -42,6 +40,7 @@ ENV PATH="${VENV_PATH}/bin:$PATH"
 
 # Install dependencies, notebook is because of mybinder.org
 RUN \
+    pip3 install -U pip && \
     pip3 install wheel && \
     pip3 install -r requirements.txt && \
     pip3 install --no-cache notebook