Create LINQ notebook and initial tutorial (dotnet#68)

* first draft of code.

* Update Dockerfile (dotnet#1)

* fix online display

* Revert "fix online display"

This reverts commit ed7adfe.

* fix JSON syntax

* fix formatter correctly

* fix JSON error

* add explanatory text

Add text description for the lesson.

* change span to div

The div is needed to force a line break.

Co-authored-by: Diego <[email protected]>

Dockerfile

@@ -1,4 +1,4 @@
-FROM jupyter/scipy-notebook:latest
+FROM jupyter/base-notebook:latest
 
 # Install .NET CLI dependencies
 
@@ -14,40 +14,40 @@ USER root
 RUN apt-get update
 RUN apt-get install -y curl
 
+ENV \
+    # Enable detection of running in a container
+    DOTNET_RUNNING_IN_CONTAINER=true \
+    # Enable correct mode for dotnet watch (only mode supported in a container)
+    DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Skip extraction of XML docs - generally not useful within an image/container - helps performance
+    NUGET_XMLDOC_MODE=skip \
+    # Opt out of telemetry until after we install jupyter when building the image, this prevents caching of machine id
+    DOTNET_TRY_CLI_TELEMETRY_OPTOUT=true
+
 # Install .NET CLI dependencies
-RUN apt-get install -y --no-install-recommends \
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
         libc6 \
         libgcc1 \
         libgssapi-krb5-2 \
-        libicu60 \
+        libicu66 \
         libssl1.1 \
         libstdc++6 \
-        zlib1g 
-
-RUN rm -rf /var/lib/apt/lists/*
+        zlib1g \
+    && rm -rf /var/lib/apt/lists/*
 
 # Install .NET Core SDK
-
-# When updating the SDK version, the sha512 value a few lines down must also be updated.
-ENV DOTNET_SDK_VERSION 3.1.200
-
-RUN curl -SL --output dotnet.tar.gz https://dotnetcli.blob.core.windows.net/dotnet/Sdk/$DOTNET_SDK_VERSION/dotnet-sdk-$DOTNET_SDK_VERSION-linux-x64.tar.gz \
-    && dotnet_sha512='5b9398c7bfe7f67cd9f38fdd4e6e429e1b6aaac0fe04672be0f8dca26580fb46906fd1d2deea6a7d3fb07d77e898f067d3ac1805fe077dc7c1adf9515c9bc9a9' \
+RUN dotnet_sdk_version=3.1.301 \
+    && curl -SL --output dotnet.tar.gz https://dotnetcli.azureedge.net/dotnet/Sdk/$dotnet_sdk_version/dotnet-sdk-$dotnet_sdk_version-linux-x64.tar.gz \
+    && dotnet_sha512='dd39931df438b8c1561f9a3bdb50f72372e29e5706d3fb4c490692f04a3d55f5acc0b46b8049bc7ea34dedba63c71b4c64c57032740cbea81eef1dce41929b4e' \
     && echo "$dotnet_sha512 dotnet.tar.gz" | sha512sum -c - \
     && mkdir -p /usr/share/dotnet \
-    && tar -zxf dotnet.tar.gz -C /usr/share/dotnet \
+    && tar -ozxf dotnet.tar.gz -C /usr/share/dotnet \
     && rm dotnet.tar.gz \
-    && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet
-
-# Enable detection of running in a container
-ENV DOTNET_RUNNING_IN_CONTAINER=true \
-    # Enable correct mode for dotnet watch (only mode supported in a container)
-    DOTNET_USE_POLLING_FILE_WATCHER=true \
-    # Skip extraction of XML docs - generally not useful within an image/container - helps performance
-    NUGET_XMLDOC_MODE=skip \
-    # Opt out of telemetry until after we install jupyter when building the image, this prevents caching of machine id
-    DOTNET_TRY_CLI_TELEMETRY_OPTOUT=true
-
+    && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \
+    # Trigger first run experience by running arbitrary cmd
+    && dotnet help
+
 # Copy notebooks
 COPY ./notebooks/ ${HOME}/Notebooks/