Update icu.net; Fix ubuntu 22.04 (#3171)

.github/workflows/backend.yml

@@ -11,7 +11,7 @@ permissions: # added using https://github.com/step-security/secure-workflows
 
 jobs:
   test_build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         dotnet: ["8.0.x"]
@@ -104,7 +104,7 @@ jobs:
       actions: read # for github/codeql-action/init to get workflow details
       contents: read # for actions/checkout to fetch code
       security-events: write # for github/codeql-action/autobuild to send a status report
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       # See https://docs.stepsecurity.io/harden-runner/getting-started/ for instructions on
       # configuring harden-runner and identifying allowed endpoints.

Backend/BackendFramework.csproj

@@ -22,8 +22,8 @@
     <PackageReference Include="Xabe.FFmpeg" Version="5.2.6"/>
 
     <!-- SIL Maintained Dependencies. -->
-    <PackageReference Include="icu.net" Version="2.9.0" />
-    <PackageReference Include="Icu4c.Win.Full.Lib" Version="62.2.1-beta" />
+    <PackageReference Include="icu.net" Version="2.10.1-beta.4" />
+    <PackageReference Include="Icu4c.Win.Full.Lib" Version="62.2.3-beta" />
     <PackageReference Include="SIL.Core" Version="14.1.1" />
     <PackageReference Include="SIL.Core.Desktop" Version="14.1.1">
       <NoWarn>NU1701</NoWarn>

Backend/Dockerfile

@@ -26,15 +26,18 @@ ENV APP_FILES=${HOME}/.CombineFiles
 # Install system dependencies.
 RUN apt-get update \
   && apt-get install -y \
-  # icu.net dependency: libdl.so
-  libc6-dev ffmpeg \
+  ffmpeg \
   && rm -rf /var/lib/apt/lists/*
 
 # Create the home directory for the new app user.
 RUN mkdir -p $HOME
 
-# Modify the existing app user to prevent login.
-RUN usermod -s /sbin/nologin -c "Docker image user" app
+# Setup app user and group to known UID/GID; no login.
+RUN groupmod --gid 999 app
+RUN usermod  --uid 999 --gid app \
+      --shell /sbin/nologin \
+      --comment "Docker image user" \
+      app
 
 ## Set up application install directory.
 RUN mkdir $APP_HOME && \

README.md

@@ -95,17 +95,15 @@ A rapid word collection tool. See the [User Guide](https://sillsdev.github.io/Th
    git clone https://github.com/sillsdev/TheCombine.git
    ```
 
-2. [Chocolatey][chocolatey]: (Windows only) a Windows package manager.
+2. [Chocolatey][chocolatey] (Windows only): a Windows package manager.
 3. [Node.js 20 (LTS)](https://nodejs.org/en/download/)
+
    - On Windows, if using [Chocolatey][chocolatey]: `choco install nodejs-lts`
    - On Ubuntu, follow
      [this guide](https://github.com/nodesource/distributions/blob/master/README.md#installation-instructions) using the
      appropriate Node.js version.
-4. [.NET 8.0 SDK](https://dotnet.microsoft.com/download/dotnet/8.0)
-
-   - On Ubuntu 20.02 or earlier, follow
-     [these instructions](https://docs.microsoft.com/en-us/dotnet/core/install/linux-ubuntu).
 
+4. [.NET 8.0 SDK](https://dotnet.microsoft.com/download/dotnet/8.0)
 5. [MongoDB](https://mongodb.com/docs/manual/administration/install-community/) provides instructions on how to install
    the current release of MongoDB.
 
@@ -126,6 +124,11 @@ A rapid word collection tool. See the [User Guide](https://sillsdev.github.io/Th
 7. [Python](#python): The Python section of this document has instructions for installing _Python 3_ on each of the
    supported platforms and how to setup your virtual environment.
 8. [FFmpeg](https://www.ffmpeg.org/download.html) and add its `/bin` to your PATH.
+
+   - On Mac:
+     - If using [homebrew](https://formulae.brew.sh/formula/ffmpeg): `brew install ffmpeg`
+     - If manually installing from the FFmpeg website, install both `ffmpeg` and `ffprobe`
+
 9. [dotnet-format](https://github.com/dotnet/format): `dotnet tool update --global dotnet-format --version 5.1.250801`
 10. [dotnet-reportgenerator](https://github.com/danielpalme/ReportGenerator)
     `dotnet tool update --global dotnet-reportgenerator-globaltool --version 5.0.4`