Get citeproc-node

git clone https://github.com/zotero/citeproc-node.git
cd citeproc-node

Fetch CSL 1.0 citation styles to where citeproc-node will find them

git clone https://github.com/citation-style-language/styles.git csl

Get CSL locale files

git clone https://github.com/citation-style-language/locales.git csl-locales

Your directory listing is now

citeprocmodule.js     csl                  sampledata.json
citeprocnode.js       cslFetcher.js        test
citeprocnode-repl.js  csl-locales          testciteproc.js
citeServerConf.json   csl_nodejs.js        zoteronode.js
citeServer.js         csl_nodejs_jsdom.js
COPYING               node_modules

(csl, csl-locales, node_modules and test are all directories)

An attempt to start the server may yield this error (the command syntax shown below assumes the node binary is in your path, of course):

node ./lib/citeServer.js
...
Error: Unable to load shared library /blah/blah/contextify.node
...

If so, follow the instructions at the top of the error message, which on a Linux system might read something like this:

To rebuild, go to the Contextify root folder and run 
'node-waf distclean && node-waf configure build'.

So we do this:

cd node_modules/jsdom/node_modules/contextify/
node-waf distclean &&  node-waf configure build

If the command gives an error the first time, try it again. If that does not help, try this while you are still in the contextify directory:

cd .. && rm -r contextify
git clone https://github.com/brianmcd/contextify.git
cd contextify && npm rebuild

Return to the top of the citeproc-node directory and attempt to run the server (again assuming that the node binary is in your path):

node ./lib/citeServer.js

If all is well, you will see:

debug log file :./citeServerLog.log
precaching CSL engines
Server running at http://127.0.0.1:8085/

Now to test the server using the sampledata.json file provided in the citeproc-node sources. Try posting it to your server (which you should still have running):

curl --header "Expect:nothing" --header "Content-type: application/json" --data @sampledata.json -X POST http://127.0.0.1:8085?responseformat=html\&style=modern-language-association

You should see this response appear on your screen:

<div class="csl-bib-body">
  <div class="csl-entry">Abbott, Derek A. et al. “Metabolic Engineering of <i>Saccharomyces Cerevisiae</i> for Production of Carboxylic Acids: Current Status and Challenges.” <i>FEMS Yeast Research</i> 9.8 (2009): 1123–1136. Print.</div>
  <div class="csl-entry"><i>Beck V. Beck</i>. Vol. 1999. 1999. Print.</div>
  <div class="csl-entry">---. Vol. 733. 1999. Print.</div>
  <div class="csl-entry">Bennett, Frank G., Jr. “Getting Property Right: ‘Informal’ Mortgages in the Japanese Courts.” <i>Pacific Rim Law &#38; Policy Journal</i> 18 (2009): 463–509. Print.</div>
  <div class="csl-entry"><i>British Columbia Elec. Ry. V. Loach</i>. Vol. 1916. 1915. Print.</div>
  <div class="csl-entry"><i>Clayton Act</i>. 1914. Print.</div>
  <div class="csl-entry">---. Vol. 38. 1914. Print.</div>
  <div class="csl-entry"><i>Donoghue V. Stevenson</i>. Vol. 1932. 1932. Print.</div>
  <div class="csl-entry">D’Arcus, Bruce. <i>Boundaries of Dissent: Protest and State Power in the Media Age</i>. New York: Routledge, 2006. Print.</div>
  <div class="csl-entry"><i>FTC Credit Practices Rule</i>. Vol. 16. 1999. Print.</div>
  <div class="csl-entry">Malone, Kemp. <i>Chapters on Chaucer</i>. Baltimore: Johns Hopkins Press, 1951. Print.</div>
  <div class="csl-entry">Malone, Nolan J., U.S. Bureau of the Census. <i>Evaluating Components of International Migration: Consistency of 2000 Nativity Data</i>. New York: Routledge, 2001. Print.</div>
  <div class="csl-entry"><i>People V. Taylor</i>. Vol. 73. 1989. Print.</div>
  <div class="csl-entry">---. Vol. 541. 1989. Print.</div>
  <div class="csl-entry">---. Vol. 543. 1989. Print.</div>
  <div class="csl-entry">Razlogova, Elena. “Radio and Astonishment: The Emergence of Radio Sound, 1920-1926.” Society for Cinema Studies Annual Meeting. 2002.</div>
  <div class="csl-entry">---. “True Crime Radio and Listener Disenchantment with Network Broadcasting, 1935-1946.” <i>American Quarterly</i> 58 (2006): 137–158. Print.</div>
  <div class="csl-entry">Razlogova, Elena, and Lisa Lynch. “The Guantanamobile Project.” <i>Vectors</i> 1 (2005): n. pag. Print.</div>
  <div class="csl-entry">Zelle, Rintze M. et al. “Key Process Conditions for Production of C<sub>4</sub> Dicarboxylic Acids in Bioreactor Batch Cultures of an Engineered <i>Saccharomyces Cerevisiae</i> Strain.” <i>Applied and Environmental Microbiology</i> 76.3 (2010): 744–750.</div>
  <div class="csl-entry">梶田将司 et al. “高等教育機関における次世代教育学習支援プラットフォームの構築に向けて.” <i>日本教育工学会論文誌</i> 31.3 (2007): 297–305. Print.</div>
  <div class="csl-entry"><i>民法</i>. Print.</div>
</div>

And … er … that's it!