Upgrade requirements

.travis.yml

@@ -20,7 +20,7 @@ before_script:
 
 script:
   - sudo docker-compose exec app flake8
-  - sudo docker-compose exec app nosetests
+  - sudo docker-compose exec app python -m unittest
 
 after_script:
   - docker-compose down

Dockerfile

@@ -1,11 +1,14 @@
-FROM python:3.7-slim
+FROM python:3.11-slim
 
-ENV PYTHONUNBUFFERED=1
-ENV LC_ALL=C.UTF-8
-ENV LANG=C.UTF-8
-ENV FLASK_APP=app/api.py
+ENV PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_ROOT_USER_ACTION=ignore \
+    PIP_DISABLE_PIP_VERSION_CHECK=1 \
+    LC_ALL=C.UTF-8 \
+    LANG=C.UTF-8 \
+    FLASK_APP=app/api.py
 
-RUN apt update && apt install -y tesseract-ocr && \
+RUN apt-get update && apt-get install -y tesseract-ocr && \
     rm -rf /var/lib/apt/lists/*
 
 COPY ./requirements.txt /code/requirements.txt

requirements.txt

@@ -1,6 +1,3 @@
-flake8<4.0
-flask>=1.0,<1.1
-nose<2.0
-pytesseract>=0.2.1,<0.3
-
-pillow>=6.2.3 # not directly required, pinned by Snyk to avoid a vulnerability
+flake8>=7.1,<8.0
+flask>=3.0,<3.1
+pytesseract>=0.3.10,<0.4