docs: add FreeBSD build steps

README.md

@@ -123,6 +123,37 @@ cmake -G Xcode -DOPEN_FOR_IDE=ON <FDB_SOURCE_DIRECTORY>
 You should create a second build-directory which you will use for building
 (probably with make or ninja) and debugging.
 
+#### FreeBSD
+
+1. Check out this repo on your server.
+1. Install compile-time dependencies from ports.
+1. (Optional) Use tmpfs & ccache for significantly faster repeat builds
+1. (Optional) Install a [JDK](https://www.freshports.org/java/openjdk8/)
+   for Java Bindings. FoundationDB currently builds with Java 8.
+1. Navigate to the directory where you checked out the foundationdb
+   repo.
+1. Build from source.
+
+    ```shell
+    sudo pkg install -r FreeBSD \
+        shells/bash devel/cmake devel/ninja devel/ccache  \
+        lang/mono lang/python3 \
+        devel/boost-libs devel/libeio \
+        security/openssl
+    mkdir .build && cd .build
+    cmake -G Ninja \
+        -DUSE_CCACHE=on \
+        -DDISABLE_TLS=off \
+        -DUSE_DTRACE=off \
+        ..
+    ninja -j 10
+    # run fast tests
+    ctest -L fast
+    # run all tests
+    ctest --output-on-failure -v
+    ```
+
+
 ### Linux
 
 There are no special requirements for Linux.  A docker image can be pulled from