DOC: Add tips for conda users when installing pyproj (#1001)

Author: snowman2

docs/installation.rst

@@ -29,7 +29,22 @@ The easiest methods for installing pyproj are:
 
       conda config --prepend channels conda-forge
       conda config --set channel_priority strict
-      conda install pyproj
+      conda create -n pyproj_env pyproj
+      conda activate pyproj_env
+
+  .. note::
+      "... we recommend always installing your packages inside a
+      new environment instead of the base environment from
+      anaconda/miniconda. Using envs make it easier to
+      debug problems with packages and ensure the stability
+      of your root env."
+        -- https://conda-forge.org/docs/user/tipsandtricks.html
+
+  .. warning::
+      Avoid using `pip install` with a conda environment. If you encounter
+      a python package that isn't in conda-forge, consider submitting a
+      recipe: https://github.com/conda-forge/staged-recipes/
+
 
   - `pypoj` is maintaned by the `pyproj-feedstock maintainers <http://github.com/conda-forge/pyproj-feedstock>`__
   - `PROJ` is maintaned by the `proj.4-feedstock maintainers <http://github.com/conda-forge/proj.4-feedstock>`__