Would it be possible to add a comment system to Shaarli posts?
It seems so.

• Add Disqus or Isso comments box on a permalink page [#181](./add-tag/181)
• also see Shaarli plugins, may be some ready-made solution out there.

I am heavily indebted to Hoger Gerhardt for posting his example on TeX.SE.

I chose to put a DOI symbol (thanks to the Academicons package) at the end of each bib entry. I think it looks rad.

\usepackage[backend=biber,date=year,doi=true,url=false,style=nature]{biblatex}
\usepackage{fontawesome5}
\usepackage{academicons}
\usepackage{hyperref}
\renewbibmacro*{finentry}{%
   \iffieldundef{doi}{%
      % Entry lacks DOI
      \iffieldundef{url}{%
         % Entry lacks URL and DOI
         \finentry%
      }{%
         % Entry has URL but lacks DOI
         % Show URL hyperlink as icon (concsiously not using same icon as our "external hyperlinks")
         \finentry\space%
         \href{\thefield{url}}{\footnotesize\faIcon{link}}%
      }%
   }{%
      % Entry has DOI \aiDoi
      \finentry\space%
      % lower the DOI  symbol a little to align better with baseline
      \href{https://doi.org/\thefield{doi}}{\raisebox{-0.1ex}{\aiDoi}}%
   }%
}%
% suppress output of DOI field (hide both DOI label and string)
\DeclareFieldFormat{doi}{}%

Here's an example of how the typeset bibliography entries look like (please excuse the poor resolution, the screenshotter suddenly decided to drop the quality):

Road vehicles

• The Hague is the first Dutch city with a taxi fleet running on H₂ (Toyota Mirai, specifically) (2020-04).
• As part of the European Commission's JIVE project, a dozen H₂ buses for Bolzano, Italy. The buses are manufactured by Solaris and have a range of 350 km on a single tank of LH2 (2019-07).
• FlixMobility (parent company of Flixbus) plans to operate fuel cell coaches on long-distance routes (2019-11). This as part of the research project HyFleet together with its partners Freudenberg Fuel Cell e-Power Systems and ZF Friedrichshafen AG, overseen by the German Federal Ministry of Transport and Digital Infrastructure, with start of commercial operation slated for 2024. More sources: 1.
• The first H₂-powered double decker buses have started operation in Aberdeen, UK (2021-02). The project was funded by the city, the EU, and the Scottish government, for 15 buses costing about 0.5 million GBP apiece.
• Gross-Gerau district in Germany plans for 80 H₂-powered buses in its fleet by 2028. I wonder how many buses the city operates in total.
• Hyundai plans to sell 1600 heavy trucks in Europe, and cooperates with Hydrospider for the H₂ supply.

Trains

• San Bernardino county in California awarded a contract for a H₂-powered train in 2019 to Stadler to run by 2024. I thought southern California was densely populated - why not electrify the tracks? Fuel cells are better than dirty and loud diesel locomotives, I suppose. This is the first H₂ fuel cell train in the US, and many other places in the US are quite sparsely populated, so let's hope it is followed by more.

Ships

• The Norwegian Public Roads Administration is to operate the world's first H₂-powered ferry connecting its fjords. The ship is built by Norled and has a carrying capacity 299 passengers and 80 cars. Details on its power train have not been forthcoming.
• A river vessel on the Rhone river with a powertrain built by ABB, supported by the European Commission's Fuel Cells and Hydrogen Joint Undertaking (FCH JU) and in cooperation with other parties.
• The first H₂-powered ferry in the US has started serving San Franscisco Bay. It takes 75 passengers, has three fuel cell stacks, and a top speed of 20 knots. The project was awarded a $3 million grant by the California Air Resources Board. For reference, there are about 1000 passenger ferrys operating in the United States.
• The world's first LH2 carrier has been put into service ferrying grey H₂ (meaning H₂ produced from fossil sources) from Australia to markets in Japan. The vessel was built by Kawasaki Heavy Industries and comes equipped with a tank able to hold 1250 m³ of liquified H₂ at a temperature of -253℃ (20 K).

Midsummer får 32 miljoner euro (ca 300 miljoner kronor) från EUs innovationsfond för att bygga en CIGS tunnfilmsfabrik om 200 MW i Sverige.

https://midsummer.se