✨ feat: Add ffmpeg (#12)

## Description

**What(what issue does this code solve/what feature does it add):**

**How(how does it solve it):**

## Required Checklist:

- [ ] I have added any necessary documentation and comments in my code
(where appropriate)
- [ ] I have added tests to make sure my code runs in all contexts

## Further comments

ffmpeg.Dockerfile

@@ -0,0 +1,19 @@
+FROM ubuntu:23.10
+
+RUN apt-get -yqq update \
+    && apt-get install -yq --no-install-recommends \
+    software-properties-common \
+    ca-certificates \
+    && apt-get autoremove -y \
+    && apt-get clean -y
+
+RUN apt-get update -y; \
+    apt-get upgrade -y; \
+    add-apt-repository ppa:savoury1/ffmpeg4 \
+    add-apt-repository ppa:savoury1/ffmpeg6 \
+    apt-get update -y; \
+    apt-get upgrade -y && apt-get dist-upgrade -y; \
+    apt-get install ffmpeg -y; \
+    #
+    # Log out the ffmpeg version
+    ffmpeg -version