How to install "openjdk-8-jdk" or "JDK 1.8" in Dockfile?

[JenniferYingyiWu2020]

Dear All,
I have read the "How to use" and "Quick Start" section of your README.md file, and have created the Dockerfile using
"
FROM tiangolo/uvicorn-gunicorn-fastapi:python3.7
"

Due to "openjdk-8-jdk" is needed in my project, and I searched "JDK installation package of the docker image" when the command "docker build -t ..." have been executed:

"
RUN apt-get update && apt search jdk
"
However, instead of "openjdk-8-jdk", just only "openjdk-11-jdk" was found. Because of "openjdk-8-jdk" is the only right version of "JDK" that can be used in my project, could you pls help to give me some suggestions for how to install "openjdk-8-jdk" or "jdk 1.8" in the Dockerfile? Thanks!

Some log information of "docker build -t ..." is below: (The log file is only related with "apt search jdk")

search_jdk.txt

[graue70]

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[graue70]

Regarding your issue: uvicorn-gunicorn-fastapi:python3.7 is based on uvicorn-gunicorn:python3.7 which is based on python:3.7 which is based on buildpack-deps:buster which is a Debian Buster OS.
That means you can install openjdk-8-jdk in uvicorn-gunicorn-fastapi:python3.7 the same way you can install it on Debian Buster. You should be able to find information on how to do that.